зеркало из https://github.com/mozilla/gecko-dev.git
427 строки
13 KiB
C++
427 строки
13 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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// as does this
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#define NS_IMPL_IDS
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#include "nsICharsetConverterManager.h"
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#include "nsICharsetAlias.h"
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#undef NS_IMPL_IDS
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#include "nsIServiceManager.h"
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#include "nsISupports.h"
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#include "nsIPref.h"
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#include "nsIMimeConverter.h"
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#include "msgCore.h"
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#include "rosetta_mailnews.h"
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#include "nsMsgI18N.h"
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#include "nsFileSpec.h"
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#include "nsFileStream.h"
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#include "nsMsgMimeCID.h"
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#include "nsMimeTypes.h"
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#include "nsIEntityConverter.h"
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#include "nsISaveAsCharset.h"
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static NS_DEFINE_CID(kPrefCID, NS_PREF_CID);
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static NS_DEFINE_CID(kCMimeConverterCID, NS_MIME_CONVERTER_CID);
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static NS_DEFINE_CID(kCharsetConverterManagerCID, NS_ICHARSETCONVERTERMANAGER_CID);
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static NS_DEFINE_CID(kEntityConverterCID, NS_ENTITYCONVERTER_CID);
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static NS_DEFINE_CID(kSaveAsCharsetCID, NS_SAVEASCHARSET_CID);
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//
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// International functions necessary for composition
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//
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// Convert an unicode string to a C string with a given charset.
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nsresult ConvertFromUnicode(const nsString& aCharset,
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const nsString& inString,
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char** outCString)
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{
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*outCString = NULL;
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if (inString.IsEmpty()) {
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*outCString = nsCRT::strdup("");
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return (NULL == *outCString) ? NS_ERROR_OUT_OF_MEMORY : NS_OK;
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}
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// Note: this will hide a possible error when the unicode text may contain more than one charset.
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// (e.g. Latin1 + Japanese). Use nsMsgI18NSaveAsCharset instead to avoid that problem.
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else if (aCharset.IsEmpty() ||
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aCharset.EqualsIgnoreCase("us-ascii") ||
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aCharset.EqualsIgnoreCase("ISO-8859-1")) {
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*outCString = inString.ToNewCString();
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return (NULL == *outCString) ? NS_ERROR_OUT_OF_MEMORY : NS_OK;
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}
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else if (aCharset.EqualsIgnoreCase("UTF-8")) {
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*outCString = inString.ToNewUTF8String();
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return (NULL == *outCString) ? NS_ERROR_OUT_OF_MEMORY : NS_OK;
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}
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nsAutoString convCharset;
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nsresult res;
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// Resolve charset alias
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NS_WITH_SERVICE(nsICharsetAlias, calias, kCharsetAliasCID, &res);
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if (NS_SUCCEEDED(res)) {
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nsAutoString aAlias(aCharset);
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if (aAlias.Length()) {
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res = calias->GetPreferred(aAlias, convCharset);
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}
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}
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if (NS_FAILED(res)) {
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return res;
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}
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NS_WITH_SERVICE(nsICharsetConverterManager, ccm, kCharsetConverterManagerCID, &res);
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if(NS_SUCCEEDED(res)) {
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nsIUnicodeEncoder* encoder = nsnull;
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// get an unicode converter
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res = ccm->GetUnicodeEncoder(&convCharset, &encoder);
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if(NS_SUCCEEDED(res) && (nsnull != encoder)) {
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PRUnichar *unichars = (PRUnichar *) inString.GetUnicode();
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PRInt32 unicharLength = inString.Length();
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PRInt32 dstLength;
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res = encoder->GetMaxLength(unichars, unicharLength, &dstLength);
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// allocale an output buffer
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*outCString = (char *) PR_Malloc(dstLength + 1);
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if (nsnull != *outCString) {
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PRInt32 oldUnicharLength = unicharLength;
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char *tempCString = *outCString;
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PRInt32 totalCLength = 0;
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while (1) {
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res = encoder->Convert(unichars, &unicharLength, tempCString, &dstLength);
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// increment for destination
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tempCString += dstLength;
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totalCLength += dstLength;
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// break: this is usually the case
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// source length <= zero and no error or unrecoverable error
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if (0 >= unicharLength || NS_ERROR_UENC_NOMAPPING != res) {
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break;
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}
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// could not map unicode to the destination charset
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// increment for source unicode and continue
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unichars += unicharLength;
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oldUnicharLength -= unicharLength; // adjust availabe buffer size
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unicharLength = oldUnicharLength;
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// reset the encoder
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encoder->Reset();
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}
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(*outCString)[totalCLength] = '\0';
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}
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else {
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res = NS_ERROR_OUT_OF_MEMORY;
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}
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NS_IF_RELEASE(encoder);
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}
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}
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return res;
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}
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// Convert a C string to an unicode string.
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nsresult ConvertToUnicode(const nsString& aCharset,
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const char* inCString,
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nsString& outString)
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{
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if (NULL == inCString) {
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return NS_ERROR_NULL_POINTER;
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}
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else if ('\0' == *inCString) {
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outString.SetString("");
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return NS_OK;
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}
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else if (aCharset.IsEmpty() ||
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aCharset.EqualsIgnoreCase("us-ascii") ||
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aCharset.EqualsIgnoreCase("ISO-8859-1")) {
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outString.SetString(inCString);
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return NS_OK;
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}
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nsAutoString convCharset;
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nsresult res;
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// Resolve charset alias
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NS_WITH_SERVICE(nsICharsetAlias, calias, kCharsetAliasCID, &res);
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if (NS_SUCCEEDED(res)) {
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nsAutoString aAlias(aCharset);
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if (aAlias.Length()) {
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res = calias->GetPreferred(aAlias, convCharset);
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}
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}
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if (NS_FAILED(res)) {
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return res;
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}
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NS_WITH_SERVICE(nsICharsetConverterManager, ccm, kCharsetConverterManagerCID, &res);
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if(NS_SUCCEEDED(res) && (nsnull != ccm)) {
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nsIUnicodeDecoder* decoder = nsnull;
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PRUnichar *unichars;
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PRInt32 unicharLength;
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// get an unicode converter
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res = ccm->GetUnicodeDecoder(&convCharset, &decoder);
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if(NS_SUCCEEDED(res) && (nsnull != decoder)) {
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PRInt32 srcLen = PL_strlen(inCString);
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res = decoder->GetMaxLength(inCString, srcLen, &unicharLength);
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// allocale an output buffer
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unichars = (PRUnichar *) PR_Malloc(unicharLength * sizeof(PRUnichar));
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if (unichars != nsnull) {
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// convert to unicode
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res = decoder->Convert(inCString, &srcLen, unichars, &unicharLength);
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outString.SetString(unichars, unicharLength);
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PR_Free(unichars);
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}
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else {
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res = NS_ERROR_OUT_OF_MEMORY;
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}
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NS_IF_RELEASE(decoder);
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}
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}
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return res;
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}
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// Charset to be used for the internatl processing.
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const char *msgCompHeaderInternalCharset()
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{
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// UTF-8 is a super set of us-ascii.
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// We can use the same string manipulation methods as us-ascii without breaking non us-ascii characters.
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return "UTF-8";
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}
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// MIME encoder, output string should be freed by PR_FREE
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char * nsMsgI18NEncodeMimePartIIStr(const char *header, const char *charset, PRBool bUseMime)
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{
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// No MIME, just duplicate the string.
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if (PR_FALSE == bUseMime) {
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return PL_strdup(header);
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}
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char *encodedString = nsnull;
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nsIMimeConverter *converter;
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nsresult res = nsComponentManager::CreateInstance(kCMimeConverterCID, nsnull,
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nsCOMTypeInfo<nsIMimeConverter>::GetIID(), (void **)&converter);
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if (NS_SUCCEEDED(res) && nsnull != converter) {
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res = converter->EncodeMimePartIIStr_UTF8(header, charset, kMIME_ENCODED_WORD_SIZE, &encodedString);
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NS_RELEASE(converter);
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}
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return NS_SUCCEEDED(res) ? encodedString : nsnull;
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}
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// MIME decoder
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nsresult nsMsgI18NDecodeMimePartIIStr(const nsString& header, nsString& charset, nsString& decodedString)
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{
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nsIMimeConverter *converter;
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nsresult res = nsComponentManager::CreateInstance(kCMimeConverterCID, nsnull,
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nsCOMTypeInfo<nsIMimeConverter>::GetIID(), (void **)&converter);
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if (NS_SUCCEEDED(res) && nsnull != converter) {
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res = converter->DecodeMimePartIIStr(header, charset, decodedString);
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NS_RELEASE(converter);
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}
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return res;
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}
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// Get a default mail character set.
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char * nsMsgI18NGetDefaultMailCharset()
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{
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nsresult res = NS_OK;
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char * retVal = nsnull;
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NS_WITH_SERVICE(nsIPref, prefs, kPrefCID, &res);
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if (nsnull != prefs && NS_SUCCEEDED(res))
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{
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char *prefValue;
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res = prefs->CopyCharPref("intl.character_set_name", &prefValue);
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if (NS_SUCCEEDED(res))
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{
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//TODO: map to mail charset (e.g. Shift_JIS -> ISO-2022-JP) bug#3941.
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retVal = prefValue;
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}
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else
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retVal = nsCRT::strdup("ISO-8859-1");
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}
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return (nsnull != retVal) ? retVal : nsCRT::strdup("ISO-8859-1");
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}
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// Return True if a charset is stateful (e.g. JIS).
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PRBool nsMsgI18Nstateful_charset(const char *charset)
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{
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//TODO: use charset manager's service
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return (nsCRT::strcasecmp(charset, "ISO-2022-JP") == 0);
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}
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// Check 7bit in a given buffer.
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// This is expensive (both memory and performance).
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// The check would be very simple if applied to an unicode text (e.g. nsString or utf-8).
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// Possible optimazaion is to search ESC(0x1B) in case of iso-2022-jp and iso-2022-kr.
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// Or convert and check line by line.
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PRBool nsMsgI18N7bit_data_part(const char *charset, const char *inString, const PRUint32 size)
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{
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char *aCString;
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nsString aCharset(charset);
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nsString outString;
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nsresult res;
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aCString = (char *) PR_Malloc(size + 1);
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if (nsnull != aCString) {
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PL_strncpy(aCString, inString, size); // make a C string
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res = ConvertToUnicode(aCharset, aCString, outString);
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PR_Free(aCString);
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if (NS_SUCCEEDED(res)) {
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for (PRInt32 i = 0; i < outString.Length(); i++) {
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if (outString.CharAt(i) > 127) {
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return PR_FALSE;
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}
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}
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}
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}
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return PR_TRUE; // all 7 bit
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}
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// Simple parser to parse META charset.
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// It only supports the case when the description is within one line.
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const char *
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nsMsgI18NParseMetaCharset(nsFileSpec* fileSpec)
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{
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static char charset[kMAX_CSNAME+1];
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char buffer[512];
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nsInputFileStream fileStream(*fileSpec);
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*charset = '\0';
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while (!fileStream.eof() && !fileStream.failed() &&
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fileStream.is_open()) {
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fileStream.readline(buffer, 512);
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if (*buffer == CR || *buffer == LF || *buffer == 0)
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continue;
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for (int i = 0; i < (int)PL_strlen(buffer); i++) {
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buffer[i] = toupper(buffer[i]);
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}
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if (PL_strstr(buffer, "/HEAD"))
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break;
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if (PL_strstr(buffer, "META") &&
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PL_strstr(buffer, "HTTP-EQUIV") &&
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PL_strstr(buffer, "CONTENT-TYPE") &&
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PL_strstr(buffer, "CHARSET")
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)
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{
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char *cp = PL_strstr(PL_strstr(buffer, "CHARSET"), "=") + 1;
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char seps[] = " \"\'";
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char *token;
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char* newStr;
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token = nsCRT::strtok(cp, seps, &newStr);
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if (token != NULL)
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{
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PL_strcpy(charset, token);
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}
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}
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}
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return charset;
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}
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nsresult nsMsgI18NConvertToEntity(const nsString& inString, nsString* outString)
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{
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nsresult res;
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outString->SetString("");
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nsCOMPtr <nsIEntityConverter> entityConv;
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res = nsComponentManager::CreateInstance(kEntityConverterCID, NULL,
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nsIEntityConverter::GetIID(), getter_AddRefs(entityConv));
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if(NS_SUCCEEDED(res)) {
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PRUnichar *entities = NULL;
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res = entityConv->ConvertToEntities(inString.GetUnicode(), nsIEntityConverter::html40Latin1, &entities);
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if (NS_SUCCEEDED(res) && (NULL != entities)) {
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outString->SetString(entities);
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nsAllocator::Free(entities);
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}
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}
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return res;
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}
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nsresult nsMsgI18NSaveAsCharset(const char* contentType, const char *charset, const PRUnichar* inString, char** outString)
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{
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NS_ASSERTION(contentType, "null ptr- contentType");
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NS_ASSERTION(charset, "null ptr- charset");
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NS_ASSERTION(outString, "null ptr- outString");
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if(!contentType || !charset || !outString)
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return NS_ERROR_NULL_POINTER;
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*outString = NULL;
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PRBool bTEXT_HTML = PR_FALSE;
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nsresult res;
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if (!nsCRT::strcasecmp(contentType, TEXT_HTML)) {
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bTEXT_HTML = PR_TRUE;
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}
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else if (nsCRT::strcasecmp(contentType, TEXT_PLAIN)) {
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return NS_ERROR_ILLEGAL_VALUE; // not supported type
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}
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// Resolve charset alias
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nsAutoString aCharset(charset);
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NS_WITH_SERVICE(nsICharsetAlias, calias, kCharsetAliasCID, &res);
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if (NS_SUCCEEDED(res)) {
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nsAutoString aAlias(aCharset);
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if (aAlias.Length()) {
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res = calias->GetPreferred(aAlias, aCharset);
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}
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}
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if (NS_FAILED(res)) {
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return res;
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}
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nsCOMPtr <nsISaveAsCharset> aConv; // charset converter plus entity, NCR generation
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res = nsComponentManager::CreateInstance(kSaveAsCharsetCID, NULL,
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nsISaveAsCharset::GetIID(), getter_AddRefs(aConv));
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if(NS_SUCCEEDED(res)) {
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// attribute:
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// html text - charset conv then fallback to entity or NCR
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// plain text - charset conv then fallback to '?'
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char charset_buf[kMAX_CSNAME+1];
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res = aConv->Init(aCharset.ToCString(charset_buf, kMAX_CSNAME+1),
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bTEXT_HTML ?
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nsISaveAsCharset::attr_EntityAfterCharsetConv + nsISaveAsCharset::attr_FallbackDecimalNCR :
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nsISaveAsCharset::attr_plainTextDefault + nsISaveAsCharset::attr_FallbackQuestionMark,
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nsIEntityConverter::html40);
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if (NS_SUCCEEDED(res)) {
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res = aConv->Convert(inString, outString);
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}
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}
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return res;
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}
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// RICHIE - not sure about this one?? need to see what it did in the old
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// world.
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char *
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nsMsgI18NGetAcceptLanguage(void)
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{
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return "en";
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}
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